Claw extractor

Abstract

A claw extractor for pulling a part from a shaft. The extractor comprises a plurality of claws for gripping the part and a drive element for engaging the shaft. Provided on the rear end of the tool is a guide provided with arcuate grooves extending from the inside to the outside. Slide stubs, cooperatively connected to the claws, are received within the grooves to thereby move the claws.

I claim: 
     
       1. Claw extractor (1) including a body having a shank therein and having at least three unitary, one piece claws (5) which are designed to hook onto a part (9) to be removed from a shaft (10) while the shank (12) bears against this shaft (10), the claw (5) being connected to the body (2) of the extractor by way of a link (3), the shank being aligned with the longitudinal axis of the extractor and the extractor further including: guide means (15) which freely rotate about the longitudinal axis of the extractor, but is fixed in translation along said axis, said guide means (15) including closed slots (17) therethrough which permit the simultaneous movement of the claws (5) to be guided by an angular rotation of the guide means about said axis of the extractor; and   said guide means (15) comprising a disk mounted at the rear end of the extractor, said rear end being opposite the extractor end which is adapted to contact the part to be removed (9), said disk (15) incorporating said slots (17) which extend from the center outwardly; received in said slots are slidable stubs (19) fixed to said links (3), the links being articulated on the claws (5) and also connected to the claws by yokes (25) which prevent the free rotation of the claws (5) relative to the links (3), but which permit the claws to slide in the yokes.   
     
     
       2. Claw extractor as claimed in claim 1, in which said guide means (15) incorporates a control arm (21). 
     
     
       3. Claw extractor as claimed in claim 2, in which the guide means (15) incorporates curved slots (17) which extend from the interior outwardly. 
     
     
       4. Claw extractor as claimed in claim 1, in which the guide means (15) incorporates curved slots (17) which extend from the interior outwardly. 
     
     
       5. Claw extractor as claimed in claim 1 wherein the claw extractor shank is a threaded shank and wherein the claw extractor body includes a nut, said threaded shank being adapted to threadably engage said nut. 
     
     
       6. Claw extractor as claimed in claim 1 wherein the claw extractor shank is a piston shank and wherein the claw extractor body includes a cylinder, said piston shank being adapted to slide in said cylinder.